Meat sawing apparatus



1932- E. w. BLEAM MEAT SAWING APPARATUS Filed Sept. 19 1931 3 Sheets-Sheet Fig. I

INVENTOR. E2 7far Wjleanv 44 ATTORNEY.

5 Sheets-Sheet 2 INV ENTOR. Edgar K15186272 -4.I, ATTORNEY.

ltlllll 41 1|||| L EI I M ll 2 n a T t Filed Sept. 19.

Aug. 23, 1932.

E. w. BLEAM MEAT SAWING APPARATUS Filed Sept. 19, 1931 3 Sheets-Sheet 5- i W OM N v INVENTOR. 5635962" ATTORNEY.

EDGAR Patented Aug. 23, 1932 usurso STATES PATENT, OFFICE W. BLEAM, OF PHILADELPHIA, PENNSYLVANIA ASSIGNOR T0 ATLAS MANU- FACTURING COMPANY, A CORPORATION OF DELAWARE MEAT sAwrNe APPARATUS Application filed September 19',

My invention relates generally to sawing apparatus, and more particularly to apparatus adapted for sawing meats.

In accordance with my invention, one or more nozzles for delivering a blast, as of air, to remove the adhering material from the saw, and particularly from the gullets of the saw teeth, are caused to revolve to prevent particles thrown off by the air blasts from adhering to the surface of the nozzle and accumulatin g adjacent the saw blade, and more specifically scraper structure engages the surface of the revolving nozzle to insure the positive removal of any accumulation thereon. I

Further in accordance with my invention, the air blasts from the revolving nozzles engage the saw blade and the gullets of the teeth in a direction which is normal tothe side faces of the blade, and preferably the air blasts and nozzles are closely confined by a housing so that the dispersion of the removed material by the air blasts willbe limited to a very small zone.

Further in accordance with one form of my invention, the air blasts are in opposition to each other and combine at the gullets of the teeth, while in another form, the air blasts are staggered longitudinally along the saw blade successively to' engage the same.

In meat sawing apparatus the grease on, the saw blade and its pulleys,'about which it passes, and also changes in thrust or tension on the blade occurring in operation, give the blade a tendency to walk off the pulleys, in the direction of the teeth of the blade, and I provide a flange member which engages the teeth, when necessary, to give the blade a thrust and cause its return to its proper track or position on the pulleys.

My invention further resides in the features of combination, construction and arrangement hereinafter described and claimed.

For an understanding of my invention and for an illustration of some of the forms it may take, reference is to be had to the accompanying drawings in which: I

Fig. 1 is a side elevational View, partly in section of a meat cutting machine constructed in accordance wlth my invention.

' operation,

place.

Fig. 2 is a front elevational view, partly in section, of the machine shown in Fig. 1.

Fig. 3 is an enlarged front elevation, partly in section, of the cleaning apparatus.

Fig. it is a front elevation, partly in section, of a modified form of the cleaning apparatus.

Fig. 5 is a side view taken along the line 5-5 of Fig. 3. I

Fig. 6 is a plan view, partly in section, of a portion of the cleaning apparatus.

Fig. 7 is a detail of the lower pulley of Figs. 1 and 2. A 1

In a machine for sawing meats the apparawe must cut'the meat without leaving any residue from the blade of the saw thereon, so that the meat will not require wiping or cleaning after sawing. The cleaning of such Serial No. 563,872.

that small ligaments or stringy bits of meat, and the fats present in meat, have a tendency to cling to the saw blade, the former gathering in the throats orgullets of the saw teeth, and the latter collecting upon the side faces of the blade. If this accumulation is not continuously removed from the blade, not only will the particles clinging in the teeth of the blade interfere with the actual cutting but the meat cut by the blade will be smeared across its face with fatty accumulations at the side of the blade and will be unattractive in appearance and therefore unsaleable until after a cleaning operation. It is therefore important toi'dispose of the removed material and confine it in such manner as to prevent it from returning to the saw blade. In the interests of sanitation it is also important to prevent the material from being thrown about the interiorof the base of the machine in which the removal takes 7, Referring to the drawings, particularly Figs. 1 and 2, the reference numeral 1 generally designates a base supporting directly a compartment 2 and a standard 3 which carries a pair of wheels or pulleys 4, about'which operates a band saw 5. The upper wheel is made adjustable, as by a hand wheel 6, so that the saw may be maintained under proper tension, and the saw is equipped with the usual side and back tension thrusts as indicated at 7 and 8 respectively. Upon the upper surface of the compartment 2 a carriage 9 for carrying the meat to be cut is mounted on rollers 9a for Jermitting the carriage to travel any suitable manner, as by the gears and belt drive shown, for drivingthe saw blade in the direction indicated by the arrows, and 'also.fo1"operating the air compressor 13, \YlllChhY means of the air line 14; and the flexible hoses 15 (shown more clearly in. Fig. 6) supply compressed air to the cleaning inechanism-for removing material adhering to the saw-blade in the manner hereinafter explained. The cleaning apparatus is generally designated at 1*6,-and more clearly illustrated in Figs. 3 to 6 inclusive. A porous receptacle 17 for receiving the removed material is-f'astened .tO the discharge end of the cleaning apparatus.

Fig. 3 is an enlarged view of the saw cleaning apparatus, partly in section,-and Fig. 5 is side view taken along the line 55 of Fig. 3. The apparatus comprises a pair of s'crapers -'20 'which' operate in combination with a ir blasts from the nozzles .30 positioned 'below th'e scrapers to remove the adhering particles and material from the blade. The

1 'scr'a'pers are'finntlysecured-between plates 21 and :22 by c'means bf-scre'ws 23. "The edges of the 'sorapersmeet to form "a COIitlnUOHS surthe "saw so "that movement ofthe saw and again come into contact with the "blade, 'but :"each has cutawa'y portio'n asi'ndieated at2 1- in Fig. 5such tha'tthe scraper doesino t 'engage thesaw teeth, but comes into active engagement. with :the saw *bla'dc'a t' a point just 'rearwardly-of the gulletsoftheteeth and extending to the :rear edge 0f the blade. The scrapers thus remove substantially all of "the particles clingin'gl to the side faces of the saw, which particles fall down'the inclined surfaces of the scrapers, through the opening of :16 and into the"receptacle '17 below. The plate 22 terminates in aroun dshaft 25 which :is supported in a bearing 26, and by means of the set screW'27 theposition'and degree'of contact of the scraperswithrespect to the saw blade can be adjusted.

There'may still -remain,'however,,ligaments or'stringy bits of :meat or other material --which have hung in the .gullets of the teeth,

and blasts of air,-orequivalentfluid means, are directed against the blade so as to remove the remaining material. The scrapers '20 engage the saw just rearwardly of the gullets sure.

and is adapted accumulate ;to such an extent strands dislodged by the scraper blades to force them from the gullets and carry them away from the saw. The jets or blasts operate with considerable force being produced through small orifices 31 at a substantial pres- The two jets in the arrangement of Fig. 3 are directlyopposed to each other,and thus blast away the remaining adhering particles directly from each side of the blade.

In order to restrict the dispersion of the removed material to a small zone, the delivery ends of the nozzles are enclosed in cylindrical housings on either side of the blade, one end of each of the housings being adjacent the blades and the opposite end of each being closed by extensions 33 from the nozzles. In Figs. and 4- the housings on the right of the saw blade and t 1e corresponding nozzles are shown in section. he 'hous ing may be cast integral with the frame members 35, as shown in Fig. 6, or may comprise separate members mounted on the frame. The housing has an opening as indicated at 36in Fig. 5 through which the removed material falls oris blown b the air blasts into the porous receptacle 17. The receptacle is sufiiciently porous to permit the ready escape of the air, but retains the removed material, :to be readily removable from the cleaning apparatus in order to empty the same whenever necessary or desiral le.

Due to the adhesive nature of the removed lmaterial thereis a-tendency for it "to accumulate on the nozzles adjacent the saw blade, an d if this is not prevented the material may that it will reengage the blade. Since this may occura't a point below the nozzles and therefore not be subject toremoval by the air blasts, the saw blade will not be clean when it engages the meat and the latter will 'besmeared thereby. In order to prevent this accumulation the nozzles are caused to rotate by means of gears 42 and 11-3 which are driven through a gear train by the motor 12, shown in Figs. land 2. Entering through the opening 36 of the housing and en aging the nozzles are scrapers 37 (Figs. 3 to 5) on either side of p the saw blade, the

the base 38 by means of the plate 39 and scrapers being secured to screws 40. The enclosed ends of the scrapers are tapered to form complemental surfaces with the taperedends of the nozzles, and as the nozzles revolve, the scrapers remove any material adhering thereto, the removed maandshovv's new the coni pifes'sedai r is are ere-c1 thereto mm the supply line 14 by means or flexible connections 15 and hollow and con tin s 45 in which the nozzles rotate.

It is necessar to areas the various parts bf the mailman-m time to time, mania ma be wave-many done by man er an air blast flromfthe flexible hose '46 which is normall eased w the com artment '2', By manipul'atioii of the tweqvay valve 14a, the air blast to the revoli' ingnofz'zl'es maybe "cut 5 and loft, and air supplied to th'ehose a6 which may be inan'ually used to blow out debris clinging teary part of the apparatus.

Fig. rshe'ws modification ofthe cleaning apparatus in which the nb'z'zle's are out of registry with respect to each other "so that the saw blade sucfce s'siv'ely passes two air blasts, instead or, having the air blasts in bpipos'ition as infthefc'onstruc'tion fQliFig; 3. Iii the modification of Fig}. 4 it Will be seen thatthe housings 32 and the bearings for the names 30 are likewise out of registry.

The grease on the 'saiv blade, due to its contact With the ineat, causes the Wheels or p111- leys 4: to also becolne greasy and'theblad'e has a tendency to walk ofi the pulleys in the direction of the teeth of the blade. A150,? change in thrust or tension on the blade, as at the instant-a cut is finished, may cause Walking of the blade in this direction. Info'rder to prevent this, and also to cause the blade to travelin its proper track on the crown ofthe Julle'ys, a flange i'sfo'rn'ied on the pulleys, preferably the lower pulley 4, shown in detail in Fig. 7, which flange 'nga'gesthe teeth of the blade 5 when the latter has walked toward the flange, and gives a light thrust to the blade, thereby causing it to return to its proper position on the pulley. Since the flange 50 and the saw blade are traveling at the same speed, and as the coefli'cient of friction is verylovv between the blade and i'pulley at the speed traveled, a light -thrust only is required to return the blade to its proper position, and the teeth-are not dulled or da-mageclby their'cohtact with the flange.

,1 have found that asati-sfactony position for the flange is on this lower pulley that it bination with a saw blade'and means for supporting [and :nozjzle tor directing an air blast against is not necessary to use acorresponfding flange enthe npper'ipul'ley. The use (if a flangeon "brie pulley-da ly is -ajdvan'tageons that it does ri'ot prevent ready renrevalof the blade, when desired.

What Iclairn is: u j 1. In meat satvi'ng apparatus, and in eclebination with a saw blade and ine'ans 'f'o'r "stipporting and driving the same, rheans for directing a I remove particles from the teeth of the blade, ineans engaging the said 'last iiai'ned directing -a remove particles adhering to the teeth of the bination with nozzle bination th a saw blade and means for sup- "the -eXterior shr fluid blast against the blade to 'rneans for removing particles accumulating he v 2. In meat sawing apparatus, and in combinatioh with a saw blade and means for supporting and driving the sahiepni'eans for directing a fluid bla'st against the blade to rerhove p'articles froi'n the teeth of the blade, and a scraper ehgaging the said-last-nanned fneans for reinovihg particles accumulating thereon.

3.121 meat sawing apparatus, and in combinatibn with a saw blade and means for supporting driving the same, means for fluid blast agai'nst the blade to blade, scraper structure engaging the said ineans'for removing particle's accumulating thereon, a housing enclosing said means to prevent the dispersion of the removedpar ti'cles to other parts "of the apparatus. 4. In ineat s'avvin'g apparatus, and combination with a saw blade and means fer supporting and driving the same, revolving flneans for directing a fluid blast against the blade to 'r'im ov'e particles adhering to the teeth or the blade, and scraper structure engaging said revolving lneans for removing particles accumulating thereon.

5. In inea't sawing apparatus, and in coma saw blade and inea'nsfor supporting and driving the same, revolving ineans for directing a fluid blast against the blade to remove particles adhering to the teeth of the blade, and a fiz ied scraper engag- I f6. In meat savvi gappara bihaitionwith a saw blade and means for supporting and'drivi'ng the same, a revolving I for'directing a fluid blast against the blade to; remove particles adheringto the "teethlof the blade.

In I'Ifeat sawing apparatus, and in comporting and driving the sa1ne',a revolvmg nozzle for directing a 'fluid blast against the blade to remove particles adhering to the teeth of "the blade, and afix'ed scraper having onefend engaging the exterior surface of the revolving nozzle for removing particles accumulating thereon. v

8. In meatsavving apparatus, and in 001-11- same, a revolving the blade to remove particles adhering to the teeth of the blade and having an exterior tapered surface, and affixed scraper having a complementary tapered portion engaging face of the revolving nozzle driving the for r'ernbvm'g "particle's accumulating thereon.

, 9L In satvingjapparatus, and in c'ombination wane sew blade" and ine ans for "supporting and driving same, a ievcllvitng noi'zlefor directing an air blastaga-ihst the tus, and in comblade to remove particles adhering to the teeth of the blade, a fixed scraper having a complementary edge engaging the exterior surface of the nozzle for removing particles accumulating thereon, and a fixed housing enclosing the nozzle and edge of the scraper to prevent the dispersion of the removed particles to other parts of the apparatus.

10. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, arevolving nozzle for directing an air blast against the blade to remove particles adhering to the teeth of the blade, a scraper engaging the exterior surface of the nozzle for removing particles accumulating thereon, and a fixed housing enclosing the nozzle and scraper, said housing providing a bearing for the revolving nozzle.

11. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, revolving nozzles on each side of the blade for directing air blasts against the blade to remove particles adhering to the teeth thereof, scraper means engaging the exterior surfaces of the revolving nozzles to remove particles accumulating thereon, and a fixed housing on either side of the blade enclosing the revolving nozzles and comprising a bearing therefor.

12. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, a revolving nozzle for directing an air blast against the blade to remove particles adhering to the teeth of the blade, a scraper engaging the exterior surface of the nozzle for removing particles accumulating.thereon, a housing surrounding said nozzle to prevent the dispersion of the removed particles, an opening in the housing through whichthe removed particles pass, and a receptacle in communication with said opening for collecting a nd retaining said removed particles.

13. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, nozzles on each side of the blade for directing fluid blasts against the gullets of the teeth, the blasts being in opposed relation with respect to each other to remove particles adhering to the teeth of the blade, and means closely surrounding and enclosing said nozzles in the zone adjacent the saw blade to prevent dispersion of the removed particles.

14. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, revolving nozzles on each side of the blade for directing fluid blasts against the gullets of the teeth, the blasts being in opposed relation with respect to each otherto remove particles adhering to the teeth of the blade, and means enclosing said nozzles to prevent dispersion of the removed particles. 15. In meat sawing apparatus, and in com bination with a saw blade and means for supporting and driving the same, revolving nozzles on each side of the blade for directing fluid blasts against the blade in a direction normal to the surface of the blade to remove particles adhering to the teeth of the blade,'and means enclosing said nozzles to prevent dispersion of the removed particles.

16. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, a plurality of means out of registry with respect to each other for directing air blasts successively against the blade in the direction of its travel to remove particles adhering to the teeth of the blade, said air blasts having a direction normal to the side of the blade.

17. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, revolving nozzles on either side of the blade for directing air blasts against the blade in a direction normal to the surface thereof, said nozzles being out of registry with respect to each other so that the air blasts will successively engage the blade in the direction of its travel.

18. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, revolving nozzles on either side of the blade for directing an air blast against the blade to remove particles adhering to the teeth of the blade, gears at the ends of each nozzle engaging a driving unit, and scrapers engaging the exterior surfaces of each of said nozzles for removing particles accumulating thereon.

19. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, revolving nozzles on either side of the blade for directing fluid blasts against the blade to remove particles adhering to the teeth ofthe blade, each of said nozzles having a gear at its end for engaging a driving unit, and driving gears mounted on a common shaft for engaging the first named gears.

20. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, revolving nozzles on either side of the blade for directing air blasts against the blade to remove particles adhering to the teeth of the blade,

and means for causing said nozzles to rotate in the same direction with respect to each other.

21. In meat sawing apparatus, and in combination with a saw blade and means for supporting and driving the same, revolving nozzles on either side of the blade for directing air blasts against the blade to remove particles adhering to the teeth thereof, scraper means engaging the'exterior surfaces of said nozzles for removing particles accumulating thereon, a housing enclosing said nozzles for preventing the dispersion of the removed particles, an opening in said housing through which the removed particles pass, and a receptacle covering said opening having a porous Wall permitting passage of the air blasts but retaining the removed particles.

EDGAR W. BLEAM. 

